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Two blocks, one of 50 g and the other of 46 g, are connected by a string and hung over a frictionless pulley which has a radius of 5 cm. When released from rest, the heavier block is observed to fall 75 cm in 5 s without the string slipping on the pulley. What is the moment of inertia of the pulley?
A 25 gram ball is fired with an initial speed v1 toward a 125 gram ball that is hanging motionless from a 1.25 meter string. The balls have a perfectly elastic collision. As a result, the 125 gram ball swings out until the string makes an angle of..
A car is traveling in the x direction with a velocity of 20 m/s. The driver applies the brakes, What is the stopping distance
At what angle should the road be banked. The charge on the inner shell is 4.59 x 10- 8 C and that on the outer shell is 2.15 x 10- 8 C. Find out the electric field (in N/C) (a) at r = 12.7 cm and (b) at r = 37.3 cm.
A vertical solid steel post of diameter d = 21.4cm and length L = 2m is required to support a load of mass m = 7650kg. What is the stress in the post
How much work is needed to move a 120-kg refrigerator.
A closed loop of wire is given the shape of a circle with a radius of 0.483 m. find the magnitude of the average induced emf in the wire during this time
A car starts from rest and then accelerates uniformly to a linear speed of 16 m/s in 42 s. If the tires have a radius of 27 cm, what are the following.
A molecule of DNA (deoxyribonucleic acid) is 2.09 µm long. The ends of the molecule become singly ionized: negative on one end, compute the effective spring constant of the molecule
An object of mass 1.0kg is attached to a spring with spring constant 15 N/m. what is the amplitude of oscillation
A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 seconds before reaching the water below. How high is the bridge from the water? How far horizontally does the rock travel before striking the water.
A 51-kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. What is the magnitude of the kinetic frictional force
A 0.500-kg mass on a spring has velocity as a function of timegiven by vx(t) = (3.60cm/s) sin[(4.71s-1)t -?/2]. What is the force constant of the spring
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